FireChek comes with thermal shutoffs and resettable memory shape alloy to automatically shut down a pneumatic control system when a nearby fire occurs, or when the ambient temperature reaches 135, 150, or 165 F. The testability and reset makes it a preferred choice over emergency isolation valves that rely on fusible links or plastic burn-through tubing. When the FireChek senses excessive heat from a nearby fire, it immediately closes the air-supply line to prevent the air from feeding the fire.